- GeoRef, Copyright 2004, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
"Seven new species of microfossils from the Buildwas shales (Wenlockian) of England are described. They are grouped with the hystrichospheres and assigned to two new genera, Deunffia and Domasia. Veryhachium monacanthum Deunff is transferred to Deunffia."